I remember seeing him sing this wonderful song on Springwatch Unsprung a couple of years ago! He is actually an avid supporter of Wildlife Conservation, and many songs on the Murmurs CD are on that theme. The CD is in itself a thing of wonder! I wish they'd have him back on Springwatch!
This is just beautiful! Thanks for posting. Does anyone know how Martin has his guitar tuned, here? He plays a bit of this song in his fingerstyle masterclass video (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EAoQGSiVsy4.html) on a vintage Martin in DADGAD with no capo. Here, though, he appears to be playing the same PRS that, as he said in the above video (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EAoQGSiVsy4.html), is usually strung with light-gauge strings, yet it's capoed on the 2nd fret and still sounds in D-- maybe the DADGAD intervals but a step down, to CGCFGC?